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冻虾为什么会变黑

更新时间: 2020-11-03 00:00:00     

如果是从冰冻室拿出来前就变黑了,那就是不新鲜的了。若是解冻前还好好的,解冻后变色变黑,一般是比较正常的情况。虾变黑主要是因为虾体内的多酚氧化酶使酪氨酸产生黑色素,而虾头部的多酚氧化酶更多,所以会出现虾头发黑的情况,从冷冻室拿出来后,放入到冷藏室中解冻,多酚氧化酶进行了氧化,所以变黑。

关键词: 冻虾 为什么

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